Number of "sets of odd lists", cf. A000262.

Terms

a(0) =1a(1) =1a(2) =1a(3) =7a(4) =25a(5) =181a(6) =1201a(7) =10291a(8) =97777a(9) =1013545a(10) =12202561a(11) =151573951a(12) =2173233481a(13) =31758579997a(14) =524057015665